1 # Author:P J J
2
3 import os
4
5 ps = '''
6 1 >>>>>> 修改商品
7 2 >>>>>> 添加商品
8 按q为退出程序
9 '''
10
11 # 打开两个文件，f文件为原来存取商品文件,f_new文件为修改后的商品文件
12 f = open('commodit', 'r', encoding='utf-8')
13 f_new = open('commodit_update', 'w+', encoding='utf-8')
14 file_list = f.readlines()
15
16 # 打印商品信息
17 while True:
18 productslist = []
19 # 从商品文件中读取出来的数据存放到productslist列表里
20 for line in file_list:
21 productname = line.strip().split()
22 productname, oldprice = line.strip("\n").split()
23 productslist.append([productname, int(oldprice)])
24 choose = input("%s请选择：" %ps)
25 if choose =='1':
26 for index, item in enumerate(productslist):
27 print(index, item)
28 productindex = input("请输入要修改价格的商品序号:")
29 if productindex.isdigit():
30 productindex = int(productindex)
31 while True:
32 print('要修改商品信息:', productslist[productindex])
33 price = input("请输入要修改的价格:")
34 if price.isdigit():
35 price = int(price)
36 productslist[productindex][1]=price
37 break
38 else:
39 print("请正确的输入价格！")
40 continue
41
42 #已经修改好的商品列表循环写入f_new文件夹
43
44 for products in productslist:
45 insert_data = "%s %s" %(products[0],products[1])
46 f_new.write(insert_data+'\n')
47 print("商品价格已经修改！")
48 # 替换原来的文件
49 f_new = open('commodit_update', 'r', encoding='utf-8')
50 data = f_new.readlines()
51 f = open('commodit', 'w+', encoding='utf-8')
52 for line in data:
53 f.write(line)
54 f.close()
55 f_new.close()
56 #删除替换文件
57 os.remove('commodit_update')
58 elif choose =='2':
59 # 添加商品
60 f = open('commodit', 'a+', encoding='utf-8')
61 pricename = input("请输入商品名:")
62 while True:
63 price = input("请输入商品价格:")
64 if price.isdigit():
65 f.writelines('%s %s\n' % (pricename, price))
66 break
67 else:
68 print('输入错误请重新输入!')
69 continue
70 f.close()
71 continue
72 elif choose =='q':
73 break
74 else:
75 print("输入错误请重新输入")
76 continue
1 # Author:P J J
2
3 productslist = []
4 f = open('commodit','r',encoding='utf-8')
5 for line in f:
6 productname,price = line.strip('\n').split()
7 productslist.append((productname,int(price)))
8
9 print(productslist)
10 shopping_list = []
11
12 salary = input("请输入你的现金:")
13 if salary.isdigit():
14 salary = int(salary)
15 while True:
16 # for item in productslist:
17 # print(productslist.index(item),item)
18 for index,item in enumerate(productslist):
19 print(index,item)
20 #判断用户要输入
21 user_choice = input("请选择要买什啥>>>:")
22 if user_choice.isdigit():
23 user_choice = int(user_choice)
24 if user_choice < len(productslist) and user_choice >= 0:
25 p_item = productslist[user_choice]
26 if p_item[1] <= salary: #买得起
27 shopping_list.append(p_item)
28 salary -=p_item[1]
29 print("加入 %s 购物车你的余额是\033[31;1m%s\033[0mRMB" %(p_item,salary))
30 else:
31 print("\033[32;1m 你的余额只剩[%s]RMB啦，还买个毛线\033[0m " %salary)
32 else:
33 print("\033[41;1m您输入的商品不存在，请重新输入!\033[0m")
34 elif user_choice == 'q':
35 print("----shopping_list----")
36 for p in shopping_list:
37 print(p)
38 print("你的余额:\033[31;1m%s\033[0mRMB" %salary)
39 #简单的余额记录
40 f = open('salary','w+',encoding='utf-8')
41 f.wr